Sidebar: keep the Blocking mark clear of the pin star

Co-Authored-By: Claude Opus 5.5 <[email protected]>

src/app/BlockingMark.module.css

@@ -6,6 +6,9 @@ only its outline, in the entry's own ink.
 */
 .mark {
   margin-left: auto;
+  /* Clear of the pin star, which sits over the entry's end (`.star` in Shell.module.css:
+     24px wide at --s-3 from the edge, inside the entry's --s-5 padding), plus a --s-2 gap. */
+  margin-right: calc(24px + var(--s-3) - var(--s-5) + var(--s-2));
   padding: 0 var(--s-3);
   border: 1px solid var(--line);
   border-radius: var(--r-full);